POWER SOURCE APPARATUS FOR CUTTING OFF MAIN POWER AND SUPPLYING POWER ONLY TO POWER SAVING CIRCUIT WHEN POWER SAVING MODE IS REQUESTED FROM ELECTRONIC DEVICE, AND POWER SUPPLY METHOD FOR DRIVING POWER SAVING CIRCUIT

摘要

PURPOSE: A power source apparatus and a power supply method are provided to reduce power consumption by cutting off a main power and supplying power only to a power saving circuit when a power saving mode is requested from an electronic device. CONSTITUTION: A power source apparatus comprises a low voltage output unit(10), a main power supply control unit(30), and an over-current sensing unit(50). The low voltage output unit outputs a low voltage to a power saving circuit in response to the drive request signal for the power saving circuit. The main power supply control unit controls power supply of a main power source in accordance with the supply cut-off signal of the main power for driving an electronic device. The over-current sensing unit senses over-current of the main power.